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We present light curve analyses of two newly identified detached eclipsingbinaries, HD 96609 and HD 303734, in the region of the richly populated opencluster NGC 3532. HD 96609 is composed of two main sequence stars (B9-A0V +A2V) with masses and radii of $M_{1}=2.66\pm0.02$$M_{\odot}$,$M_{2}=1.84\pm0.01$$M_{\odot}$, $R_{1}=2.740\pm0.006$$R_{\odot}$,$R_{2}=1.697\pm0.005$$R_{\odot}$. The positions of the components on$log~M-log~R$ plane suggests log(age/yr) 8.55, corresponding $350\pm40$ Myr ofage, which agrees with the $300\pm100$ Myr age of NGC 3532 estimated inprevious studies. We find the distance of HD 96609 as $460\pm17$ pc, which isconsistent with the $484^{+35}_{-30}$ pc distance of NGC 3532, estimated fromGAIA parallaxes. HD 303734 is an interesting totally eclipsing binary with aquite shallow secondary eclipse. Using photometric properties of the system inconjunction with theoretical calibrations, we estimate that HD 303734 consistsof A6V + K3V components. HD 96609 and HD 303734 are the second and thirdeclipsing binaries discovered in the region of NGC 3532, after the first one,GV Car.

Two newly identified eclipsing binaries in open cluster NGC 3532